CATALOGUE. — METEOROLOGY, BAROSCOPES. 



46 1 



Lw uber die barometer. Leipz. 1782. R. I. 

 Rosenthal Meteorologishe werkzeuge. 

 Hurler's new baroiiieier. iloz. XXIX. 346. 



Portable. 

 Acliard on barometrical measures. A. Berl. 



1786. 3. 

 M'Guire's portable barometer. Ir. tr. 1787. 



1.41. 

 M'Guire's self registering barometer. Ir. tr. 



IV. 141. 

 .idfrfams on the barometer. London, 1790. 

 Adams's leot IV. 430. 



When a tube has once had mercury boiled in it, is is 

 found, that even cold mercury will often fill it completely. 



Cotte on the effect ot temperature on the ba- 

 rometer. Roz. XLIl. 441. 

 Austin's portable barometer. Ir. tr. IV. 99. 

 Barton's barometer with a wheel inde.\. 



Manth. M.IV. 547- 

 Hamilton's portable barometer. Ir. tr. V. 95. 

 Bfylr'age zur verferligung des barometers. 



Frankf. J 795. 

 Humboldt'^s portable barometer. Journ. Phys. 



XLVII. (IV.) 468. Ph. M. IV. 304. 

 Cont^'s portable barometer. B. Soc. Phih 



n. 14. 

 Prony's barometrical balance. B. Soc. Phil. 



n. 20. 

 Guerin on a portable barometer. Journ. 



Phys. LIU. 444. Fh. iVl.XI. 362. 

 Klugel on Magellan's barometer. Hind. 



Arch. III. 182. 

 Per|>etual motion by barometers. Nich. III. 



126. 

 Keith's self registering barometer. Ed. tr. 



IV. 209. 

 "Von Arnim on barometers by Prony, Conte, 



Humboldt, Godekiiig, Brander, and Voigt. 



Gilb. 11.311. 



Some statical, others portable. 



Voigt on Haas's barometer. Gilb. IV. 456. 

 Mullei's barometer. Gilb. V. 17- 



Corrected for temperature. 



R 'dig's sim,>le barometer. Gilb. VI. 445-. 



Wilson on increasing the sensibility of the ba- 

 rometer. Nich. 8. III. 21. 



Schmidt on the double biuometer of Hny- 

 gens. Gilb. XlV. 199. 



Recommends it strongly, and makes it correct itself for 

 tompeiaturc. Without such a correction the eipansion and 

 the vapour of the spirits would produce great irregularity. 



Maigne's portable barometer. Gilb. XV. 



463. 

 A barometrical perpetual motion. Nich. IX. 



212. 

 Rees's Cyclop. III. Plates. Pneumatics. 



When the mouth of a barometer is much contracted, a 

 friction is produced. Some preserve the surface of the re- 

 servoir level, by letting it spread on a horizontal surface : 

 and if the surface is large enough, the method must be a 

 good one, but the mercury ought not to be confined to a 

 height less than one seventh of an inch. 



The specific gravity of mercury, once distilled, is frora 

 13.55 to 13.57, but Boerhaave foundit after 511 distillations 

 14.11. The density of the mercury usually employed is 

 13.6. 



Roy found that the expansion of 30 inches of mercury is 

 the barometer, including the effects of its vapour, from 32" 

 to 91°, was .1922. The results of his experiments are 

 expressed very nearly by the formula e^: .00011 182 / — 

 .000 000 0913/* — .000 000 000 OjJ^ ^ which gives .1926 

 for 92°. Some authors assert, that Roy's results are a little 

 too great : and if any dependence can be placod on Dalton's 

 analogies, the effect of the vapour must be extremely incon- 

 siderable. 



Statical Baroscopes, Air Barome- 

 ters and Manometers. 



Schotti technica curio^a. I. c. GI. 



Boyle's statical baroscope. Ph. tr. 1660 — 6. 



I. 231. 

 Hooke on a statical barometer. Birch. III. 



384, 387. 

 *Hooke's marine barometer. Ph. tr. 1701, 



XXII. 791. 



